91339689 has 16 divisors (see below), whose sum is σ = 139321728. Its totient is φ = 52142592.

The previous prime is 91339687. The next prime is 91339747. The reversal of 91339689 is 98693319.

It is a happy number.

It is not a de Polignac number, because 91339689 - 2¹ = 91339687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91339687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33049 + ... + 35705.

It is an arithmetic number, because the mean of its divisors is an integer number (8707608).

Almost surely, 2^91339689 is an apocalyptic number.

It is an amenable number.

91339689 is a deficient number, since it is larger than the sum of its proper divisors (47982039).

91339689 is a wasteful number, since it uses less digits than its factorization.

91339689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304.

The product of its digits is 314928, while the sum is 48.

The square root of 91339689 is about 9557.1799711003. The cubic root of 91339689 is about 450.3531203606.

The spelling of 91339689 in words is "ninety-one million, three hundred thirty-nine thousand, six hundred eighty-nine".